1. No harm. The battery will not be used when there is alternating current, and will only be activated when the alternating current is disconnected. The battery can protect the computer when the power is off, and the battery life is slightly shorter, but it is negligible. When in use, the plug on the book should not be frequently removed and inserted, and the interface should be constantly worn. Especially in the case of live battery damage, it is recommended to shut down before pulling. If you only use it at home, you can remove the battery and plug it directly into the power supply to extend the battery life.
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2, if the long-term use of external power supply for the laptop power supply, or the battery has exceeded 80%, immediately remove the laptop battery, usually charging does not need to be full of the battery, charge to about 80% can be; Adjust the power option of the operating system, set the power alarm to more than 20%, usually the minimum battery power should not be less than 20%, and it should be charged before it falls to 20%.
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3, charged should immediately disconnect the power cord (including the usb interface for charging function), has been then will damage the battery; Charge as often as you remember, but you don't have to fully charge the battery; Whether it is a notebook or a mobile phone, you must not let the battery run out, the so-called extreme is the truth.
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4, if you want to travel, fill the battery, charge the appliance at any time when conditions permit, in order to battery life, be sure not to wait until the battery is drained. After all, the battery has to be recycled, otherwise it will cause serious pollution to the environment.